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tpm-emulator: apply patch to fix memcmp defect found by gcc

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| tpm_emulator-0.7.4/tpm/tpm_deprecated.c:437:7:
| error: 'memcmp' reading 20 bytes from a region of size 8
| [-Werror=stringop-overflow=]

|    if (memcmp(&b1, &newAuthLink, sizeof(TPM_HMAC))) {
|        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Apply patch from Xen: vtpm_TPM_ChangeAuthAsymFinish.patch

Signed-off-by: Christopher Clark <christopher.clark6@baesystems.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
This commit is contained in:
Christopher Clark 2018-07-31 12:35:44 -07:00 committed by Bruce Ashfield
parent 16e0f6c393
commit 89cbe2cd84
2 changed files with 29 additions and 0 deletions
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28
recipes-extended/xen/files/vtpm_TPM_ChangeAuthAsymFinish.patch Normal file
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@ -0,0 +1,28 @@
Patch derived from below Xen changeset.
Signed-off-by: Christopher Clark <christopher.clark6@baesystems.com>
commit 22bf5be3237cb482a2ffd772ffd20ce37285eebf
Author: Olaf Hering <olaf@aepfle.de>
Date: Mon Jun 18 14:55:36 2018 +0200
stubdom/vtpm: fix memcmp in TPM_ChangeAuthAsymFinish
gcc8 spotted this error:
error: 'memcmp' reading 20 bytes from a region of size 8 [-Werror=stringop-overflow=]
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
diff --git a/tpm/tpm_deprecated.c b/tpm/tpm_deprecated.c
index c362b56..4c49f54 100644
--- a/tpm/tpm_deprecated.c
+++ b/tpm/tpm_deprecated.c
@@ -434,7 +434,7 @@ TPM_RESULT TPM_ChangeAuthAsymFinish(TPM_KEY_HANDLE parentHandle,
tpm_hmac_final(&hmac_ctx, b1.digest);
/* 6. The TPM SHALL compare b1 with newAuthLink. The TPM SHALL
indicate a failure if the values do not match. */
- if (memcmp(&b1, &newAuthLink, sizeof(TPM_HMAC))) {
+ if (memcmp(&b1, newAuthLink, sizeof(TPM_HMAC))) {
debug("TPM_ChangeAuthAsymFinish(): newAuthLink value does not match.");
return TPM_FAIL;
}

1
recipes-extended/xen/tpm-emulator_0.7.4.bb
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@ -16,6 +16,7 @@ SRC_URI = "\
file://vtpm-deepquote-anyloc.patch \
file://vtpm-cmake-Wextra.patch \
file://vtpm-implicit-fallthrough.patch \
file://vtpm_TPM_ChangeAuthAsymFinish.patch \
"
SRC_URI[tpm-emulator.md5sum] = "e26becb8a6a2b6695f6b3e8097593db8"
SRC_URI[tpm-emulator.sha256sum] = "4e48ea0d83dd9441cc1af04ab18cd6c961b9fa54d5cbf2c2feee038988dea459"